JPH11332146A - Assembled rotor for closed type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembled rotor for closed type compressors provided with a means which keeps the positions of magnets fitted into the rotor constant. SOLUTION: An assembled rotor is provided with a rotor body composed by laminating a plurality of iron cores 112, and magnets 120 inserted into a plurality of through-holes 106 individually bored vertically in this rotor body and fitted. An upper end plate 130 and a lower end plate 132 are joined to the upper and lower surfaces of the rotor body respectively. A spring is put between each magnet 120 and an end plate and prevents the magnet 120 from floating. Consequently, it becomes possible to prevent breakages of the magnets 120 caused by floating, and to reduce noise also. As a result, it becomes possible to maintain constant positions even at the time of high speed rotation, and to have the performance of the compressor, improved with a uniform magnetic force action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor, and more particularly, to a hermetic compressor rotor assembly provided with means for keeping the position of a magnet contained in a rotor constant at all times. About.

[0002]

2. Description of the Related Art A compressor serves to compress a refrigerant discharged through an evaporator in a refrigerating cycle to a high pressure and discharge the refrigerant to a condenser side. As shown in FIG. 1, such a compressor receives the power of the hermetically sealed container 20, the electric device portion 30 provided inside the hermetically sealed container 20, and the power transmitted from the electric device portion 30, and rotates the refrigerant. It includes a compression device section 40 for compression.

[0003] A refrigerant discharge pipe 2 is provided above the closed vessel 20.
2 is connected, a refrigerant suction pipe 24 is connected to a lower part, and an accumulator 50 is connected to the suction pipe 24. The power tool unit 30 includes a stator 32 and a rotor 60. The stator 32 is press-fitted and fixed to the inner peripheral surface of the sealed container 20, and a rotor 60 is rotatably provided at an inner diameter position of the stator 32 while maintaining an appropriate gap. A rotating shaft 36 is fixed to the center of the rotor 60.
6 has one end protruding toward the compression device 40 side.

On the other hand, as shown in FIG. 2, the rotor 60 has a rotor body 64 formed by laminating a plurality of iron cores 62.
And a magnet 70 inserted into a plurality of holes 66 vertically penetrated inside the main body 64, and upper and lower end plates 68, 69 fixed by rivets 72 to upper and lower portions of the main body 64, respectively. Be composed. A fixing hole 64a, 68a, 69a into which the rotating shaft 36 is inserted is formed in the center of the rotor body 64 and the upper and lower end plates 68, 69.
Are respectively formed.

[0005] The rotor 60 having the above configuration is
First, a rotor body 64 formed by laminating a plurality of iron cores 62 is formed. After magnets 70 are respectively inserted into holes 66 of the rotor body 64, upper and lower end plates 68 and 69 are provided on upper and lower portions of the body 64. Are assembled through a process of fixing the rivets 72 with rivets 72. Here, in order to prevent a problem that the magnet 70 is damaged or damaged during the riveting operation, the length of the hole 66 into which the magnet 70 is fitted is adjusted by the magnet 7.
By setting the length to be longer than 0, a slight extra space S is formed in the upper and lower portions of the magnet 70.

[0006] In the drawings, reference numeral 42 denotes a roller constituting the compression instrument portion 40, which is coupled to an eccentric shaft portion 36 a of the rotating shaft 36. Reference numeral 44 denotes a cylinder, and reference numerals 46 and 48 denote upper and lower flanges respectively connected to upper and lower portions of the cylinder 44 to seal the cylinder 44.

In the hermetic compressor constructed as described above, when the operation is started, the rotor 60 rotates at high speed by the magnetic force generated in the stator 32, and the eccentric shaft portion 36a of the rotating shaft 36 is accordingly moved. The connected roller 42 rotates in the space of the cylinder 44. The refrigerant is supplied to the cylinder 44 through the suction pipe 24.
And is compressed by the rotating rollers 42 and discharged through the discharge pipe 22.

However, in the general hermetic compressor as described above, the magnet 70 mounted in the hole 66 of the rotor main body 64 constituting the rotor 60 at the time of operation has the magnet 70 inside the hole 66 due to the extra space above and below. By flowing in, the upper and lower end plates 68, 69 will be impacted,
Intense noise was generated, and the magnet was damaged. Further, for the same reason, when the magnet flows and its position changes, the magnetic force generated from the magnet is not uniform, which has been a factor in lowering the performance of the motor.

[0009]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve the above-mentioned problems, and is intended to prevent the magnet from flowing in the rotor hole even when the rotor is rotating. SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotor assembly of a hermetic compressor that maintains a constant position, reduces noise, and prevents damage to magnets.

[0010]

A rotor assembly of a hermetic compressor according to the present invention for achieving the above object has a rotor body formed by laminating a plurality of iron cores, and a rotor having the same structure. Magnets respectively inserted into a plurality of holes vertically penetrated in the main body, upper and lower end plates coupled to upper and lower surfaces of the rotor main body by fastening means, and mounted in through holes of the rotor main body. And means for supporting the magnets to prevent them from flowing.

[0011] The magnet supporting means is formed of an elastic member which is positioned above and / or below the through hole of the rotor body and elastically supports the magnet by being coupled with an end plate. A compression coil spring is used as the elastic member.

[0012] Such a rotor assembly according to the present invention comprises:
Since the internal magnet is elastically supported by the elastic members provided on the upper and lower portions thereof, the magnet is prevented from flowing up and down even during high-speed rotation. Therefore, not only can the magnet be prevented from being damaged due to the flow of the magnet, but also noise can be reduced. In addition, since the magnet is elastically supported by the elastic member, a constant position is always maintained, and the performance of the compressor can be improved by a uniform magnetic force action.

[0013]

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. A rotor assembly of a hermetic compressor according to one embodiment of the present invention is shown in FIG. As shown, a rotor assembly of a hermetic compressor according to an embodiment of the present invention includes a rotor body 110 having a plurality of iron cores 112 laminated, and a rotor body 110 vertically attached to the rotor body 110. Magnets 120 inserted into the large number of holes 106, upper and lower end plates 130 and 132 fixed and provided on the upper and lower surfaces of the rotor main body 110 by fastening means 102, respectively. Upper and lower end plates 1 located at upper and lower portions of the hole 106, respectively.
An elastic member 140 that supports the magnet 120 in the hole 106 so as not to flow by the connection of the
Contains. In the drawing, two springs are shown positioned in a space S formed between the magnet 120 and one of the upper and lower end plates 130, 132. A fixing hole 104 into which a rotating shaft is press-fitted and fixed is formed at the center of the rotor main body 110, and a large number of through holes 106 are radially formed around the fixing hole 104.

The elastic member 140 is, as described above,
At the time of rotation of the rotor, the magnet 120 mounted in the hole 106 of the rotor body 110 is prevented from flowing, and at the same time,
It is a support means for maintaining the position of the magnet 120 constant. In the illustrated example, an example using a compression coil spring is shown. However, the present invention is not limited to this. , For example, a material such as rubber can be used.

Further, in the illustrated example, the compression coil spring is provided in the upper and lower spaces S so as to elastically support the upper and lower surfaces of the magnet 120 at the same time. It can be provided only for S.

The compression coil spring serving as the elastic member 140 is fixed to the upper and lower end plates 130, 132 with one end thereof fixed to the upper and lower end plates 130, 132 by fastening the upper and lower end plates 130, 132 with fastening means, ie, rivets. It supports the magnet 120 inside 106. Although not shown, the rotor body 11 of the upper and lower end plates 130, 132 is not shown.
A structure for fixing the spring, for example, a fixing protrusion may be formed at a position corresponding to the zero hole 106.

The method of assembling the rotor assembly according to an embodiment of the present invention as described above is as follows. First, a plurality of iron cores 112 are stacked to form a rotor main body 110. Thereafter, the magnets 120 are inserted into the holes 106 vertically penetrated in the rotor main body 110, respectively. At this time, the magnet 120 is mounted above and below the through hole 106 of the rotor main body 110 with a predetermined margin S.

After the magnet 120 is mounted, the rotor body 11
The end plates 130 and 132 are fixed to the upper and lower portions of the “0” by the fastening means 102. Here, since elastic members 140 are provided at predetermined portions of the upper and lower end plates 130 and 132, for example, at positions corresponding to the through holes 106 of the rotor body 110, the upper and lower end plates 130 and 132
Is connected to the rotor body 110 to form the elastic member 14.
0 is located in the upper and lower margin space S of the through hole 106. The elastic member 140 located in this manner is a magnet 120
Is elastically pressurized so as not to flow. An example of the completed rotor assembly is shown in FIG.

[0019]

The rotor assembly according to the present invention assembled as described above is provided within the stator 32 of the compressor and is rotated at high speed, and the eccentric shaft portion 36a connected thereto is attached to the cylinder 44. The refrigerant sucked while rotating in the prepared space is compressed and discharged.

At this time, when the rotor is rotated as described above, the magnet 120 is elastically supported by the elastic members 140 located above and / or below the rotor. Does not flow and does not strike the upper and lower end plates 130, 132. Therefore, damage due to the flow of the magnet can be prevented, and noise can be reduced. In addition, since the magnet is elastically supported by the elastic member, a constant position is always maintained even at the time of high-speed rotation, whereby the performance of the compressor can be improved by a uniform magnetic force action.

Although the preferred embodiment of the present invention has been illustrated and described above, the present invention is not limited to the above-described embodiment, and is generally applicable to the field to which the present invention pertains without departing from the spirit of the present invention. Anyone with the knowledge of the above will be able to implement various changes.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a general hermetic compressor.

FIG. 2 is an exploded perspective view showing a structure of a conventional rotor assembly.

FIG. 3 is an exploded perspective view illustrating a structure of a rotor assembly according to an embodiment of the present invention.

FIG. 4 is an assembled sectional view of the rotor assembly shown in FIG. 3;

[Explanation of symbols]

 Reference Signs List 102 fastening means 104 fixing hole 106 through hole 110 rotor main body 112 plural cores 120 magnet 130 upper end plate 132 lower end plate 140 elastic member S space

Claims (13)

[Claims] 1. A rotor body having a plurality of iron cores laminated thereon, magnets respectively inserted and mounted in a plurality of holes vertically penetrated in the rotor body, and upper and lower surfaces of the rotor body And an upper and lower end plate having a distance between them that is longer than the length of the magnet, and acting between the respective magnets and at least one of the end plates to flow the magnet mounted in the through hole. Means for preventing and supporting the rotor assembly. 2. The rotor assembly for a hermetic compressor according to claim 1, wherein said magnet support means is made of an elastic member. 3. The rotor assembly of claim 2, wherein the length of the magnet is shorter than the length of the through hole. 4. The rotor assembly according to claim 3, wherein the elastic member is provided between the upper end plate and each of the magnets. 5. The rotor assembly of a hermetic compressor according to claim 3, wherein the elastic member is provided between the lower end plate and each magnet. 6. The rotor assembly for a hermetic compressor according to claim 3, wherein the elastic members are provided on both sides of the upper and lower plates and the magnet. 7. The rotor assembly according to claim 3, wherein the elastic member is a compression coil spring. 8. The rotor assembly according to claim 1, wherein the length of the magnet is shorter than the length of the rotor body. 9. The rotor assembly of a hermetic compressor according to claim 1, wherein each of the support means is mounted on one of the end plates. 10. A closed container, a compression device portion provided in the closed container and having a compressor element for compressing a refrigerant, and a stator provided in the closed container and generated by the stator and the stator. A rotor driven by magnetic force and operably connected to the compressor element to drive the compressor element, the rotor comprising: a rotor body formed by stacking a plurality of iron cores; Magnets respectively inserted and mounted in a plurality of holes vertically penetrated in the rotor main body, and upper and lower end plates respectively coupled to upper and lower surfaces of the rotor main body, and a distance therebetween is longer than the magnets; Means that acts between the magnet and at least one of the end plates to support the magnet mounted in the through hole so as to prevent the magnet from flowing. 11. The hermetic compressor according to claim 10, wherein said magnet support means is made of an elastic member. 12. The hermetic compressor according to claim 11, wherein a length of the magnet is shorter than the through hole. 13. The hermetic compressor according to claim 11, wherein the elastic member is a compression coil spring.